package org.example.tlias.interception;

import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.example.tlias.context.BaseContext;
import org.example.tlias.utils.JwtProperties;
import org.example.tlias.utils.JwtUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
@Slf4j
public class JwtInterception implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getEmpToken());

        //2、校验令牌
        try {
//            log.info("jwt校验:{}", token);
            Claims claims = JwtUtils.parseJwt(token,jwtProperties.getSecretKey());
            Long empId = Long.valueOf(claims.get("id").toString());
//            log.info("当前员工id：", userId);
            BaseContext.setCurrentId(empId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
    //资源响应给客户端后执行
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //用完之后，清理
        BaseContext.removeCurrentId();
    }

}
